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Fri, 30 Aug 2024 11:33:56 +0000 Received: from DU0PR04MB9251.eurprd04.prod.outlook.com ([fe80::708f:69ee:15df:6ebd]) by DU0PR04MB9251.eurprd04.prod.outlook.com ([fe80::708f:69ee:15df:6ebd%7]) with mapi id 15.20.7897.027; Fri, 30 Aug 2024 11:33:56 +0000 From: Ciprian Costea To: Chester Lin , Matthias Brugger , Ghennadi Procopciuc , Shawn Guo , Sascha Hauer , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, NXP S32 Linux Team , Ciprian Marian Costea Subject: [PATCH v2 2/2] arm64: dts: s32g2: Disable support for SD/eMMC UHS mode Date: Fri, 30 Aug 2024 14:33:47 +0300 Message-ID: <20240830113347.4048370-3-ciprianmarian.costea@oss.nxp.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240830113347.4048370-1-ciprianmarian.costea@oss.nxp.com> References: <20240830113347.4048370-1-ciprianmarian.costea@oss.nxp.com> X-ClientProxiedBy: AM0PR07CA0020.eurprd07.prod.outlook.com (2603:10a6:208:ac::33) To DU0PR04MB9251.eurprd04.prod.outlook.com (2603:10a6:10:352::15) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR04MB9251:EE_|VI1PR04MB6989:EE_ X-MS-Office365-Filtering-Correlation-Id: 147eae14-b570-438c-4f7b-08dcc8e7a1fb X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|366016|376014; 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Signed-off-by: Ciprian Marian Costea Reviewed-by: Matthias Brugger --- arch/arm64/boot/dts/freescale/s32g274a-evb.dts | 1 + arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/s32g274a-evb.dts b/arch/arm64/boot/dts/freescale/s32g274a-evb.dts index 7ab917f547ef..b9a119eea2b7 100644 --- a/arch/arm64/boot/dts/freescale/s32g274a-evb.dts +++ b/arch/arm64/boot/dts/freescale/s32g274a-evb.dts @@ -39,5 +39,6 @@ &usdhc0 { pinctrl-1 = <&pinctrl_usdhc0_100mhz>; pinctrl-2 = <&pinctrl_usdhc0_200mhz>; disable-wp; + no-1-8-v; status = "okay"; }; diff --git a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts index 8739f63771bc..aaa61a8ad0da 100644 --- a/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts +++ b/arch/arm64/boot/dts/freescale/s32g274a-rdb2.dts @@ -45,5 +45,14 @@ &usdhc0 { pinctrl-1 = <&pinctrl_usdhc0_100mhz>; pinctrl-2 = <&pinctrl_usdhc0_200mhz>; disable-wp; + /* Remove no-1-8-v to enable higher speed modes for SD card. + * However, this is not enough to enable HS400 or HS200 modes for eMMC. + * In this case, the position of the resistor R797 must be changed + * from A to B before removing the property. + * If the property is removed without changing the resistor position, + * HS*00 may be enabled, but the interface might be unstable because of + * the wrong VCCQ voltage applied to the eMMC. + */ + no-1-8-v; status = "okay"; };